Improvement in slate roofs



. NITED STATES PATENT OFFICE.

ARTEMAS S. KIMBALL, OF BELLOWS FALLS, VERMONT, ASSIGNOR OF ONE- HALF HIS RIGHT TO SAMUEL S. ORDWTAY, OF SAME PLAGE.

IMPROVEMENT IN SLATE ROFSn Specification forming part of Letters Patent No. 150,056, dated April 2l, 1874 application filed December 31, 1873.

To all whom it may concern.

Be it known that I, ARTEMAs S. KIMBALL, of Bellows Falls, Vermont, have invented an Improvement in Slate Roofs, of which the following is a specification:

The object of my invention is to lay slates upon the roofs of buildings in such a manner as to make them actually dre-proof. This I accomplish by means of an iron frame-Work, to which the slates are attached, elevating them above the wood, and thereby giving space for dead air.

S is an iron standard with an angular slot in the top of it, formed to be set into the raft ers to support the bars upon which the slates are iiXed. B is an, iron bar with hooks in its upper edge to hold the slates and tenons on the ends to lit the slots in the standards. These hooks on the edge of the bar are at such a distance apart as the width of the slate may require, so that if the slates are one foot Wide there will be two oblongholes punched two inches from the end of the slate, and three inches from the sides or edges of the slate, leaving the twolioles in the slate just six inches apart. The hooks on the bars will be placed the same distance apart as the holes are in the slates, except at the beginning' of each al ternate row, when a half-slate will be used, in orderto break joints. Two hooks on the end of each alternate bar, nearer together, will be made to hold the half-slate. The slates when put on will slip down under the hooks and be held securely. The standards e and bars are so constructed as to obtain the lightest weight compatible with the strength required.

I claim as my invention- The iron framework upon which the slates are elevated above the wood, and to which the slates are fastened by means of hooks on the bars, substantially as described.

ARTEMAS S. KIMBALL. 

